Ribbon-loom.



Patented May l3, I902.

B. KDHLHAAS. RIBBON LOUNI.

(Application filed July 31, 1901.)

4 Sheets-Sheet I..

(No Model.)

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1151 1 6996011 i/ZPZz'azr'moa may No. 699,878. Patented May l3, I902. 3. KUHLHAAS.

RIBBON LOOM.

(Application med July :31, 1901.

4 Sheets$heet 2.

No. 699,878. v Patented May l3, I902.

R. KUHLHAAS.

RIBBON LOOM.

(Application filed July 31,.1901.) (N0 Mn L) 4 Shets--Sheei 3.

I I l l l i I lllllll m: upmus PETERS co PHOTO-LITHO., WASHINGYON, D c.

Patented May l3, I902.

R. KOHLHAAS.

RIBBON LOOM.

(Application filed July 31, 1901.)

4 Sheets-Sheet 4.

(No Model.)

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Urrn ll STATES P TENT OFFICE.

REYNOLD KOHLHAAS, OF PHILADELPHIA, PENNSYLVANIA.

' RlBBON-LO-OM.

SPECIFICATION forming part of Letters Patent No. 699,878, dated May 13, 1902.

Application filed July 31, 1901. Serial No. 70,396. (No model.)

To all whmn it may concern:

. Beitknown that I, REYNOLD Konnnnaaa citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a certain new and useful Improvement in Ribbon-Looms, of which the following is a specification.

My invention relates to a new and useful improvement in ribbon-looms, and applies to that part of the mechanism of a loom which actuates and shifts the shuttles backward and forward; and the objects of my invention are to construct this mechanism in such a manner that it will be compact and take up but little space in the loom, and this mechanism will be located underneath the lathe and not extend up above the same, so as to cut off the'light, as is the case in the apparatus now used.

Another object of my invention is to so construct the device that it will allow for quick and accurate adjustment of the throw of the loom.

WVith these ends in view this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the construction and operation will now be described in detail, referring to the accompanying drawings, forming part of this specification, in which--- Figure 1 is a side view of one end of the lathe, showing my invention applied thereto; Fig. 2, a view from the opposite side; Fig. 3, a plan view of Fig. 1; Fig. 4, a side elevation of one of the curved pulleys and spring-cam, showing the pulley in such a position that the spring-cam will raise the dog so that it can be engaged by the pawl; Fig. 5, aside elevation of one of the grooved pulleys and spring-cam, showing the pulley in such a position that the spring-cam will not operate upon the dog to raise the same; Fig. 6, an end elevation of the lathe with my invention attached thereto; Fig. 7, a section on the line 7 7 of Fig. 1; Fig. 8, a side elevation of the slotted adjustable crank-arm, showing the same in different positions in dotted lines; Fig. 9, a view similar to Fig. 8, showing the crank-arm adjusted to a different position; Fig. 10, a diagram showing how the cords are attached to the rack and to the pulleys, the rack being shown in the limit of its travel in one direction; Fig. 11, a similar view to Fig. 10, showing the rack to the limit of its travel in the opposite direction; and Fig. 12 a similar View to Figs. 10 and 11, but showing the cords adjusted so as to give a shorter throw to the shuttle. I

In the drawings, 1. represents the lathe, which is of ordinary construction, carrying the rack 2, Whichslides in the guideway longitudinally of the lathe and meshes with the fixed pinions 3, which pinions are adapted to mesh with the rack formed with the shuttles 4, and when these pinions are revolved by the rack it will cause the shuttleto travel backward and forward in its guideways or races across the space 5, through which the warp of the loom extends and in which the shed is formed. This is of ordinary construction in a ribbon-loom, and it is immaterial whether a straight shuttle is used or a curved shuttle. A rack is used to operate either,'and the func tion of my invention is to alternately recip rocate the rack backward and forward.

6 and 7 are hangers secured upon each side of the lathe-beam and depending from the same. y

8 is a short shaft journaled in bearings formed in these hangers, and one end of the shaft projects beyond the hanger 6 and has secured upon it the arm Q.

10 is a crank-arm which is located upon the shaft 8 outside of the armJ. This crankarm is adapted to be secured to the arm 9 by means of the screw or bolt 11, which passes through both and binds them together. A

curved slot 12, formed in the crank-arm and through which the bolt or screw 11 passes, is for the purpose of allowing the crank-arm to be adjusted relative to the arm 9. l The crankarm being loose upon the shaft 8 and the slot 12 being concentric to the shaft 8 will allow this crank-arm to be turned relative to the ICO is slotted, as indicated at15, through which is adapted to project a shouldered stud- 16,

which is secured to the bracket 14 by means of the bolt 17, threaded upon the end of the stud. Journaled loosely upon the stud 16, between the bracket and the hanger 6, is a pulley 18. This pulley carries upon its inner face the block 19, which is adapted to fitwithin the slot 20, formed in the cranlcarm 10. Around the pulley 18 are adapted to be wound in opposite directions two straps 22. These straps or hands lie side by side upon the pulley, and when one of them is pulled it will rotate the pulley in one direction and wind up the other strap, and when the other strap is pulled it will rotate the pulley in the opposite direction and wind up the first-named strap. This alternate pulling of the straps or hands is the means by which a reciprocating movement is converted into an alternately rotary movement and may be accomplished in any suitable manner and operated from any part of the loom-such as, for instance,a double crank-shaft could be employed with one of the straps or bands secured to one of the crank-pins and the other strap or band secured to the other crank-pin; but this forms no part of my invention. Therefore I do not deem it necessary to show or describe the same in detail.

23 and 24 are two grooved pulleys journaled loosely upon the shaft 8 between the hangers 6 and '7. Each of the pulleys have formed in their periphery two grooves, and in one of the grooves in each pulley is adapted to lie the cord 25, one end of which is secured to one pulley and the other end to the other pulley, and the loop of this cord then passes downward and around a small shive 26, which is journaled loosely upon the stud secured in a slot 27, formed inthe hanger 6. The slot 27 is vertical and allows for a certain amount of Vertical adjustment of the shive 26, for the purpose of keeping the cord 25 taut. The ends of the cord 25 are so secured to the grooved pulleys 23 and 24 that when one pulley is revolved so as to wind that end of the cord attached to it around the same it will cause the other end of the cord to unwind from the opposite pulley, and therefore rotate that pulley in the opposite direction, and then if the other pulley is revolved the end of the cord from the first-named pulley will beunwound and that pulley revolved in the opposite direction.

28 is a cord one end of which is secured to the pulley 23 and adapted to lie in the other groove of that pulley. This cord then passes upward and around a pulley 29, journaled near the end of the lathe-beam,and from there passes to the rack 2 and is secured to the same.

30 is a cord one end of which is secured to thepulley 24 and adapted to lie in the second groove of that pulley. This cord also passes upward and around a pulley 31, journaled in the lathe-beam upon the opposite side of the hangers to the pulley 29. The cord 30 in pass ing from the pulley 31 is then secured to the rack 2. These cords 28 and 30 are so secured to the pulleys 23 and 24 that when one of the pulleys is revolved in one direction it will wind one of the cords upon that pulley, and thereby cause the rack to slide in one direction, and at the same time the opposite pulley being revolved at exactly the same rate of speed,only in the opposite direction,by means of the cord 25 will allow just a sufficient length of the opposite cord to be unwound from the same to equal the distance traveled by the rack in its movement. When the rotation of the pulleys is then reversed, the rack will be pulled in the opposite direction and the cord unwound from the first-named pulley, and throughout all these movements the cords will all remain taut, because of the fact that the grooved pulleys 23 and 24 will have exactly the same movement in opposite directions to one another, because of the cord 25, which controls their movement. It is obvious that to accomplish these movements only one of the grooved pulleys 23 and 24 shall be connected to the shaft 8, so as to revolve with the same at one time, the motion of the other pulley being in the opposite direction and accomplished through the cord 25, as before described but at the next movement of the pulleys the other pulley is connected to the shaft so as to revolve with the same, and so on. At each movement of the shuttle the power is transferred from one pulley to the other. I will now describe the means by which I accomplish this movement.

Each of the pulleys 23 and 24 have pivoted to the same the dogs 32, as clearly shown in Figs. 4 and 5. These dogs are pivoted to the pulleys at the points 33 and are adapted to be held in their normal position by means of the spring 34, so that their outer edge 35 projects beyond the periphery of the pulleys, as shown in Fig. 5, a pin 36 limiting this movement. In the outer end of this dog is formed a notch 37.

38 represents pawls which are secured to the shaft 8 and adapted to revolve therewith. The nose 39 upon the pawl is adapted to enter the notch 37 in the dog 32, and thereby carry the pulley around with it in its revolution, and when the dog 32 is in its normal position, as shown in Fig. 5, the pawl can revolve freely within the pulley without engaging the same.

For the purpose of pressing the dog 32 upward at the proper time I provide the two spring cams 40, which are pivoted to the hanger 6 at the point 41 and are held upward in contact with the periphery of the pulleys 23 and 24 by means of the springs 42. The cords 28 and 30 are secured to the pulleys 23 and 24, so that the dog 32, which is carried by the opposite pulley to the one being'revolved by the pawl 38, will be directly over the cam 40 at the limit of its movement, so that the cam-will press the dog upward, so as to be engaged by its pawl in the next movement of the shaft 8; but the dog 32 upon the pulley which has been in engagement with the pawl will not stop over the cam, so that when the pawls 38 are revolved backward by the alternate rotation of the band-wheel l8 the dog 32 will be free to spring back, so that when its'pawl revolves again in the forward movement it will not engage the dog. Thus it will be seen that the pulleys can never make a full revolution, because if they did each of the dogs would stop upon the cams 40, and then each pawl would engage its dog and prevent any movement whatsoever, so that the pulleys must have a movement less than one revolution. The operation of this mechanism would then be as follows: As the band-wheel 18 is rotated in one direction one of the pawls 38 will engage one of the dogs 32 and revolve the grooved pulley to which said dog is attached the required distance, and the cords 2S and 30 are so tied to the pulleys that when this pulley has made the required revolution the other pulley, which has been revolved in the opposite direction, will be stopped, so that its dog is directly over the cam 40, and thus the dog will be forced in position to be engaged by the pawl 38. The band-wheel at this point is then reversed, the pawls traveling backward. These pawls will be allowed to pass the raised dog, because of the fact that both the dog and the cam 40 can spring downward by reason of the spring 42 and then resume its normal position after the pawl has passed. When the bandwheel and pawl have reached their limit in this retrograde movement, the band-wheel is again reversed, which will cause the pawls 38 to travel forward, and then the opposite pawl will engage the dog upon the opposite pulley to the one formerly engaged, and so on, the dogs upon the pulleys being engaged alternately, the revolution of one pulley leaving the dog upon the opposite pulley in position to be next engaged.

I have found by experience that in case the loom is stopped before the pulleys have reached the limit of their movement the weight of the Jacquard mechanism or other means may cause the shafts to travel back ward a slight distance, and this backward movement might be sufficient to then remove the pawls from the dogs before the completed movement. The dogs would then instantly spring outward and would not be again engaged by the pawls when the movement was resumed. To obviate this, I provide upon one side of the dogs the latch 43,which is pivoted to the dog at the point 44. A notch 45 is formed upon the pulley, and a light spring 46 tends to normally hold the latch out of engagement with the notch; but this latch 43 is in such aposition that when the nose 39 of the pawl 38 enters the notch 37 it will also push the latch 43 into engagement with the notch 45, and thus the dog will be held in position to be always engaged by the pawls until the latch 43 is removed from the notch. Thus if the nose 39 is removed from the notch a slight distance before the movement is completed when the movement is resumed it will again engage the dog; but after the movement has been completed and the pawls travelin g backward in their retrograde movement the finger 47, which is carried by the pawl, will strike the latch 43 and disengage it from the-notch, so as to allow it to spring in the position shown in Fig. 5, and thus when the pawl again resumes its forward movement it will not engage the dog.

It is desirable in shifting the shuttles that the movement of the shuttle shall be comparatively slow at the beginning and the speed gradually accelerated until one-half of the movement is reached and then to lessen the speed gradually until the end of the movement. This is particularly advantageousin weaving wide ribbon,so that the shuttle will be out of the shed before it closes. Complicated mechanism is now used to accomplish this result, while I accomplish it in the following simple manner: The band-wheel 18 carries the block 19, which is adapted to lie within the slot 20 of the crank-arm 10, and thus communicate motion to the crankarm. The stud upon which the band-wheel is journaled has a vertical adjustment with in the slot 15, and this band-wheel may be set upon the same plane as the shaft 8, or it may be set at a distance below the same, as shown in the drawings, and when in this position it will be seen that when the crankarm is pointing downward the block 19 will be at a distance from the shaft 8, and then as the crank-arm is revolved up to the vertical position when it points upward,as shown in Fig. 8 in dotted lines, the block 19 will gradually travel toward the shaft 8 because of the band-wheel being journaled out of line with the shaft, and thus the nearer the block travels to the shaft 8 the quicker the motion of such shaft will be, and the crankarm is secured to the shaft 8 in such a way that when said crank-arm is pointing upward in a vertical position the shuttle will then have completed one-half of its movement in one direction, and as the crank-arm continues to revolve the block 19 will gradually travel outward to the end of thearm,'and thus the speed will be gradually reduced. In very narrow ribbon of course this variation of speed would not be necessary, in which case the ,stud 16 would be set in the slot in such a way that it would be on the line with the shaft 8, and the band-wheel and shaft 8 would revolve the same as if following manner: The pulleys 23 and 24 are so placed relative to one another that the dog carried by the pulley that is not being actuated by the pawl will come in position over the cam 40 by the time the pulley is revolved a sufiicient distance to remove the rack the required distance to give the desired throw to the shuttle. This is illustrated in diagram in Fig. 12. The position the pulleys are placed in in this figure will give about one-half the throw to the rack as it would if the pulleys were in the position shown in Figs. 10 and ll-that is, when the dog 32 is at the lowest point on one of the pulleys the dog 32 upon the opposite pulley will be at the'highest point. Of course in changing the relative relation of these pulleys the cords will have to be tied so that they will be taut, and the mechanism which actuates the bandwheel will also have to be regulated so as to give the required revolution to the shaft 8, and when the revolution of the band-wheel is reduced it would also be necessary to change the position of the crank-arm 10 relative to its connection with the shaft 8 so that said crank-arm would travel an equal distance each side of the'center, so that the movement would gradually increase toward the center and diminish toward the end, as before described. For the purpose of so adjusting this crank-arm the slot 12 is provided and the screw 11 isloosened and the crank-arm turned until it will revolve an equal distance each side of the center, and then the screw ll and the nut 13 are tightened to hold the crank-arm in rigid connection with the shaft 8.

The'pulleys 29 and 31 in the lathe-beam are journaled upon a stud, which stud is carried by the slides 48. These slides are adapted to be pushed outwardhy the screws 49, which are threaded through a block 50, secured to the lathe. This construction has an ordinary tightener for the purpose of taking up any slack there might be in the cords.

The advantages of my invention are that the whole mechanism for shifting the shuttle is confined in a very small space and is so compact that it can be placed underneath the lathe, which is of great advantage over the mechanism now used, which projects upward from the lathe and cuts off the light from the work. Another advantage of my invention is that the bands which are secured to the band-wheel can be run over pulleys to any point of the machine and operated from any shaft desired, either above or below the shuttles, and a further advantage is the quickness and accuracy with which the mechanism can be adjusted to regulate the throw of the shuttle and also the simplicity by which the variation of the speed of the shuttle is accom plished.

Of course I do not wish to be limited to the exact construction here shown,'as slight modifications could be made without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is 1. In combination with a ribbon-loom, a shaft adapted to extend transversely of the lathe-beam, bearings secured to and depending from the lathe-beam in which the shaft is journaled, two pulleys journaled loosely upon said shaft, two cords, one end of one cord being attached to one of the pulleys, and one end of the other cord attached to the other pulley, pulleys journaled in the lathe-beam, one of the cords adapted to pass around one of the pulleys and be attached to the rack, the other cord adapted to pass around the other pulley and also be attached to the rack, said last-named pulleys so placed that when the cords are pulled alternately the rack will be' reciprocated, means for rocking the transverse shaft a predetermined part of one revolution backward and forward,clutching mechanism adapted to alternately connect first one and then the other of the pulleys journaled upon the transverse shaft to said shaft each time the shaft is rocked in one given direction, means whereby the pulley in clutch with the shaft will rotate the other pulley in the opposite direction at the same rate of speed so that the cord connected to one of the pulleys will be wound upon the same, and the cord connected to the other pulley will be unwound from the same, substantially as described and for the purpose specified.

2. In an apparatus of the character described, a shaft adapted to extend transversely across the lathe-beam, bearings secured to and depending from said lathe-beam, in which said shaft is journaled, two pulleys journaled loosely upon said shaft, two cords, one of which is attached to one of the pulleys and the other attached to the other pulley, two pulleys journaled in the lathe-beam, one of the cords adapted to pass over one of the pulleys and be secured to the rack, the other cord adapted to pass over the other pulley and also be secured to the rack, said pulleys so arranged in the lathe-beam that when the cords are alternately pulled the rack will be reciprocated, a band-wheel adapted to be jou rnaled upon a suitable bearing depending from the lathe-beam, two bands or straps secured to the band-wheel and wound upon the same in opposite directions, said bands or straps adapted to be alternately pulled so as to rock said band-wheel a predetermined part of one revolution backward and forward, a crankarin journaled loosely upon the transverse shaft, an arm secured to the transverse shaft, a curved slot formed in the crank-arm concentric to the transverse shaft, a screw or bolt adapted to pass through said slot and be secured to the arm which is secured to the transverse shaft, a connection between the bandwheel and the crank-arm whereby the bandwheel is rocked with the crank-arm, clutching mechanism whereby the pulleys j ournaled upon the transverse shaft are alternately connected to said shaft so as to rock therewith, means whereby the pulley which is in clutch with the shaft will cause the other pulley to rotate in the opposite direction the same distance and at the same rate of speed, whereby the cord connected to one pulley will be wound upon the same, and the cord connected to the other pulley will be unwound. from the same, said pulleys adapted to be so placed relative to one another, and the crank-arm so placed relative to the transverse shaft as to cause the shuttle to travel any distance backward and forward, provided said distance is less than that represented by the circumference of the pulleys, and the band-wheel adapted to be rocked a distance backward and forward to correspond with the adjustment of the pulleys and the crank-arm, substantially as and for the purpose specified.

3. In a device of the character described, means for increasing the speed of the shuttle midway of its travel and decreasing the speed toward each end of its stroke, consisting of a bracket havinga vertical slot formed therein, which bracket supports the stud upon which the band wheel is journaled, a shoulder formed upon said stud bearing against the inner surface of the bracket, a nut threaded upon the outer end of the stud for the purpose of holding said stud within the slot at any position it is placed, a crank-arm having a longitudinal slot formed therein, a block secured to the band-wheel and adapted to slide in said slot, said band-wheel adapted to be adjusted within the vertical slot so that its stud may be on a line with the transverse shaft upon which the crank-arm is journaled, or may be made eccentric thereto by lowering said band-wheel within the slot, substantially as described and for the purpose specified.

4. In a device of the character described, clutching mechanism consisting of a dog pivoted to each of the pulleys journaled upon the transverse shaft, a spring adapted to hold the outer edge of the dogs normally beyond the periphery of the pulleys, a notch formed in the dogs, pawls secured to the transverse shaft and adapted to rock therewith, springcams pivoted to a hanger depending from the lathe, springs adapted to normally hold said spring-cams in contact with the periphery of the pulleys and push one of the dogs inward so that the notch will lie in the path of travel of the pawls and engage said notch to carry the pulley with it in its revolution, said pulleys adapted to be so placed relative to one another that both the dogs will never be in contact with the spring-cams at the same time, but the pulleys will be so rotated that the opposite dog to the one engaged by the pawl will be brought in contact with the cam at the limit of its movement and forced in the path of travel of the pawl so as to be engaged by the same upon the next movement of the pawl, means for locking the dogs in their raised position when engaged by the pawl, and means for releasing said locking mechanism when the pawl has made about one half of its retrograde movement, substantially as and for the purpose set forth.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

REYNOLD KOHLIIAAS.

Witnesses:

FRED. E. SCHMIDT, Rosoon E. SCHMIDT, Jr. 

